I have been involved in several projects of electronic systems, some of which being self-inspired and driven.

Projects include building a quadcopter system from basic components and researching control protocols. This was more geared as just an after work hang out hardware hacking and making session with colleagues, the system is presently capable of being airborne but the group dissolved for various personal and logistic reasons before it was ever stable in closed-loop (though we were able to determine the airframe was at least attempting to regulate using accelerometer input before the hiatus) feedback and reaction time just needed dialing in. I still meet with one of the members having loaned him a 4 channel 12V power supply with individual control of each channel I made for the project. This was made using 4 CPU power supplies we had in bone pile legacy computers laying around the office I was given permission to take. The enclosure is a modified DELL Optiplex Case from one of the donor machines.

My other electronic project is a hobby beer fermentation chiller used for the lagering process (which is using a special yeast and fermenting close to freezing point, usually 10°C). The system uses a Peltier Junction heat exchange unit, the cold side being a liquid heat exchanger and the hot side exchange being an aluminum fin heatsink with linear forced air induction, though I am considering using a dual-liquid exchange setup and radiator for the hot liquid side). Cold liquid then flows into an insulated bucket  in which is placed a 5 gallon typical glass firmenter known as a carboy. The control feedback uses an NTC thermistor signal buffered to a comparator with hysteresis and user-programmable reference for power supply shutoff control in which all heat/cold production and pumping stop. I have assembled and tested most of the components and the system is working, it just needs more Peltier modules, at present it is drawing ~100W of its available 500W when active.